Vliv akumulace dusíku na vřesoviště a suché trávníky v Národním parku Podyjí

ZÁHORA, Jaroslav, Milan CHYTRÝ, Petr HOLUB, Karel FIALA, Ivan TŮMA, Jana VAVŘÍKOVÁ, Martina FABŠIČOVÁ, Iva KEIZER and Lenka FILIPOVÁ. Vliv akumulace dusíku na vřesoviště a suché trávníky v Národním parku Podyjí (The Effect of Nitrogen Accumulation on Heathlands and Dry Grasslands in the české Podyjí National Park). Životné prostredie : revue pre teóriu a tvorbu životného prostredia. Slovenská akadémia vied, 2016, vol. 50, No 2, p. 97-203. ISSN 0044-4863.

Basic information

Original name

Vliv akumulace dusíku na vřesoviště a suché trávníky v Národním parku Podyjí

Name (in English)

The Effect of Nitrogen Accumulation on Heathlands and Dry Grasslands in the české Podyjí National Park

Authors

ZÁHORA, Jaroslav, Milan CHYTRÝ, Petr HOLUB, Karel FIALA, Ivan TŮMA, Jana VAVŘÍKOVÁ, Martina FABŠIČOVÁ, Iva KEIZER and Lenka FILIPOVÁ

Edition

Životné prostredie : revue pre teóriu a tvorbu životného prostredia, Slovenská akadémia vied, 2016, 0044-4863

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Other information

Language

Czech

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

Slovakia

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Fulltext PDF

Organization unit

Faculty of Science

Keywords in English

Arrhenatherum elatius; atmospheric nitrogen deposition; Calluna vulgaris; Calamagrostis epigejos; Festuca ovina; soil; Podyji National Park

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Abstract

In English

The increasing availability of soil mineral nitrogen is often considered as a cause of expansion of nitrogen-demanding tall grasses into oligotrophic species-rich heathlands and dry grasslands dominated by Festuca ovina. Consequently these ecosystems tend to lose their biodiversity. This paper summarizes the main results of different studies focused on the soil nitrogen transformation and availability in the heathlands and dry grasslands in the Podyjí National Park (southern Czech Republic). Increasing soil mineral nitrogen availability accelerates expansion of competitive tall grasses Calamagrostis epigejos and Arrhenatherum elatius there. Subsequently, due to higher plant and microbial demands for soil mineral nitrogen, the soil nitrogen availability in the tall-grass sites decreases. At the same time, experimental addition of carbon in the form of cellulose into dry grassland decreased nitrogen availability, which indicates that such ecosystem needs more carbon to effectively use the current levels of available soil nitrogen. Substantial differences between A. elatius a C. epigejos were found in their capability to (i) accumulate nitrogen in plant tissues, (ii) resorb nitrogen from above-ground biomass during senescence and (iii) release nitrogen from plant litter during decomposition. These observations point out to different growth and nutrient use strategies of the studied grass species and associated microbial communities in the rhizosphere.